化所有接口可使超稳定的固态电池通过在现场转换有害的表面2CO3
Yong Guo1,2,3, Siyuan Pan1,2,3, Xuerui Yi1,2,3
1Nanoyang Group, Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage, School of Chemical Engineering and Technology, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, China.
Advanced materials (Deerfield Beach, Fla.)
|December 22, 2023
概括
一种新的脱碳-化策略有效地去除固态电池 (SSLB) 中的表面杂质. 这种方法可以创建稳定的接口,提高电池循环和性能,用于先进的能量存储.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 充电电池材料中的Li2CO3等表面杂质会导致动力障碍和降解.
- 缓解Li2CO3对于高能固态电池 (SSLB) 来说至关重要,但移除方法通常会导致再生.
研究的目的:
- 开发一种有效的策略,去除SSLB中有害的Li2CO3杂质.
- 为了构建稳定的,富含LiF的界面,以提高电池性能和寿命.
主要方法:
- 采用了脱碳-化策略,在现场60°C时与LiPF6反应Li2CO3.
- 这一过程适用于SSLB中的阴极和电解质材料.
主要成果:
- 在SSLB中构建了超稳定的LiF丰富的界面.
- 寄生反应被抑制,接口阻力被降低,并且实现了无树的阳极,具有7000小时循环稳定性.
- 减少了过渡金属溶解和阴极中的气体演变,改善了4.5V的速率能力和循环能力.
结论:
- 脱碳-化战略有效地克服了SSLB表面杂质和界面挑战的局限性.
- 这种全合一的方法显著推进了高性能SSLB的开发.
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